Stove or furnace.



No. 811,349. PATBNTED JAN. 30, 1906.

A. W. WOODWARD.

STOVE 0R FURNACE. APPLICATION FILED 111 2.1, 1904.

WITTEE E51 Q TINITE STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Jan. 30, 1906.

Application filed April 1, 1904:. Serial No. 201,096.

To all whom it may concern: I

Be it known that I, AMos W. WVooDwARD, citizen of the United States, residing at Rock-f ford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in Stoves and Furnaces, of

Y which the following is a specification.

One of the objects of this invention is the production of a positive underfeed for stoves and furnaces.

The invention further refers to a cookingstove having a fuel-magazine.

The invention further relates to a means for cutting off communication between the firechamber and the magazine.

A further object of the invention is the embodiment in a stove of the various improvements in detail hereinafter more fully pointed out.

In the accompanying drawings, Figure 1 is a longitudinal vertical section taken through the front part of a cooking-stove embodying my invention. Fig. 2 is a horizontal section on dotted line 2 2 of Fig. 1. Fig. 3 isa transverse vertical section on dotted line 3 3 of Fig. 2. Fig. 4c is a rear elevation of a reciprocatory scraper-plate mounted in the magazine.

In the construction of a stove embodying this invention I provide a stove-body 1, comprising the top 2, the sides 3, the front 4, the oven-walls 5, and the hearth 6. In the forward part of the stove I provide a fire-chamber 7, the bottom of which is composed of a grate made up of two sections 8 and 9, the latter being mounted to have a tilting or dumping movement upon its trunnions 9, the former section being stationary. The grate-section '8 is formed of spaced bars in the usual manner, while the section 9 is tight, or nearly so, in order to prevent too much air from reaching the burning fuel lying upon it. The section 9 is also provided witha curved wing 9, extending downwardly along its rear edge and concentric with the trunnions 9*, upon which the grate-section 9 tilts. The purpose of this wing is to keep pieces of coal or cinders from obtaining lodgment between the rear edge of the grate and the oven-wall 5 when the section 9 is oscillated on its trunnions 9. Below the grate is an ash-pit 10, the forward side of which is provided with draft-openings 10, closed by sliding shutters 10 in the usual manner.

A fuel-magazine 11 is suitably mounted at the forward side of the stove-body 1, which magazine comprises side walls 12 and the front and back walls 13 and 14. Its upper end is closed by means of a removable cover 15, and its bottom 16 is inclined toward the open forward end of the fire-chamber 7. A portion of this bottom wall 16 is double, a coal-supporting plate 16 being provided within the magazine 11 to cover a reciprocating feed-slide 17, which slide is adapted to have a forward-andback movement upon the bottom plate 16. At its forward. end this feed-slide is provided with transverse ribs 17 to prevent small pieces of Icoal from working backward under the slit e.

The reciprocatory movement of the slide is imparted to it by means of a pivoted feed-le ver 18, the forward end of which lever is bifurcated to receive a stud 19, formed integral with and extending downwardly from the feed-slide 17 and projecting through an elongated opening 16 in the bottom 16 of the fuelmagazine 11. The feed-lever 18 is pivotally mounted upon a stud 20, formed integral with and extending downwardly from the lower face of the bottom wall 16 of the magazine.

In the lower forward part of the magazine 11 and communicating with the remainder of said magazine and the fire-chamber 7 is a feeding-chamber 21, adapted to be closed from the upper part of the magazine 11 by means of a curved gate 22, fixed upon a rod 23, pivotally mounted in the stove-body, which rod may be oscillated to open and close said gate by means of a lever 24.

In the upper part of the fire-chamber 7 is an air-chamber 25, having air-inlet openings 26 in the front wall 3 of the stove-body at each side of the magazine 11. The lower wall of the air-chamber 25 is provided with several series of oppositely-inclined openings 27. In practice the openings of one series slant in one direction and the openings in the next adjacent series slant in the opposite direction, whereby air is introduced into the lire-chamber in small streams, flowing at an angle with relation to each other. through said openings 27 with a considerable amount of force, the gaseous products of combustion in the upper part of the fire-chamber are thoroughly mixed and united with the air entering said lire-chamber through the openings 27 and a complete mixture is thus formed.

A scraper-plate 28 is supported upon the As the air is drawn inner face of the rear wall 14 of the magazine by means of a rivet or bolt (not shown) eX- tending through the elongated opening 28 in said plate and the operating-rod 28", adapted to extend through a suitable opening in the side wall 12 of said magazine. The scraperplate is provided with the depending integral fingers 28 and its purpose is to loosen the coal in the magazine should it be clogged or should it stick to the wall of the magazine, and thus prevent the descent of the coal into the feeding-chamber.

In operation a fire is built in the fire-chamber 7, and a supply of coal is placed in the magazine 11. Goal is introduced into the firechamber from the magazine by the operation of the feed-slide 17. By raising the curved gate 22 a quantity of coal is permitted to descend from the upper part of the magazine into the feeding-chamber 21 and to lie upon the forward end and in the path of the feedslide 17. Should the coal clog in the magazine 11, a reciprocation of the scraper-plate 28 by means of its rod 28 will tend to free the coal and permit it to fall against the gate 22. By a movement of the lever 18 the feedslide 17 is thrown forward, forcing a new charge of coal into the body of incandescent coals upon the grate. This movement of the feed-slide tends to push the incandescent and coked coal previously fed into the fire rearwardly in the fire-chamber and upon the rear grate-section 9, where it receives and requires less air than in the earlier stages of its combustion. The new coal lying over the gratesection 8 requires much air. As it burns smoke is formed, which passes upward through a portion of the bed of coals into Which it was thrust and finally emerges at the top of the bed of coals and directly under the airchamber 25. Air entering the fire-chamber through the openings 27 in said air-chamber is thoroughly mingled with the smoke by reason of the inclination of said openings and forms an inflammable mixture with the smoke, and this mixture burns in a hot flame in the rear part of the fire-chamber over the gratesection 9. When the coal is coked, it ceases to give ofi smoke in any considerable quantities, and at this time the air entering the upper part of the fire-chamber through the inclined openings 27 in the bottom of the air-chamber 25 enters the body of burning coal and sustains combustion therein. The draft caused by the introduction of air above as well as below the bed of coals tends to hold the flame from the coals downwardly, and as a result the heat of the fire is directed against the forward wall of the oven. Draft beneath the grate is supplied by means of the draft-openings 10. The gate 22 closes tightly and cuts off all communication between the feedingchamber 21 and the magazine 11. To entirely and completely out ofi the coal in the magazine 12 from the fire-chamber 7, it is necessary 6 5 to tightly close the gate 22. The closing of the gate 22 is facilitated by the movement of the feed-slide 17 Coal lying beneath the gate that would tend to prevent the ready closing thereof is removed by a reciprocation of the slide 17.

In the application of my invention to furnaces the air-chamber might be connected with an air-pressure means, so that currents of air would enter the fire-chamber through the openings 27 with a considerable force. It is also clear that various other changes may be made in the embodiment herein shown of this invention without departing from the spirit and scope of said invention, wherefore I desire to have it understood that I do not limit myself to the precise details herein illustrated and described.

I claim as my invention 1. In a stove or furnace, in combination, a stove-body; a fire-chamber; a fuel-magazine; a coal-supporting plate in said magazine; and a reciprocatory slide supported upon the bottom wall of the fuel-magazine beneath said coal-supporting plate, said slide being provided with ridges on its under side.

2. In a stove or furnace, in combination, a fire-chamber; a fuel-magazine; a gate for partitioning off the fuel-magazine from the firechamber, said gate being adapted to close the opening between said chamber and magazine; a feed-slide toward which said gate closes; and means for reciprocating said feed-slide.

3. In a stove or furnace, in combination, a fire-chamber; a fuel-magazine; a curved gate for partitioning 01f the fuel-magazine from the fire-chamber, said gate being mounted to swing bodily in the arc of a circle; a feedslide toward which said gate closes; and means for reciprocating said feed-slide.

4:. In a stove or furnace, in combination, a fire-chamber; a fuel-magazine comprising a storage-chamber and a feeding-chamber; a

gate for partitioning off the-feeding-chamber from the storage-chamber; a coal-supporting plate in said storage-chamber; and a feed-slide supported beneath said coal-supporting plate.

5. In a stove or furnace, in combination, a fire-chamber; a fuel-magazine comprising a storage-chamber having an inclined bottom and a feeding-chamber; a gate for partitioning off the feeding-chamber from the storagechamber; an inclined coal-supporting plate in said storage-chamber; and a feed-slide supported on the inclined bottom of said storagechamber beneath said coal-supporting plate and extending into the feeding-chamber.

6. In a stove or furnace, in combination, a fire-chamber; a fuel-magazine; a movable member in said magazine for preventing clogging; a coal-supporting plate in said magazine; and a feed-slide supported beneath said coal-supporting plate.

7. In a stove or furnace, in combination, at her; and a feed-slide supported beneath said fire-chamliler; a fuel-dmagitzige conllprilsoing a coal-supporting plate. storage-c amber an a ee ing-c 1am er; a gate for partitioning OK the feeding-chamber AMOS WOODWARD' 5 from the storage-chamber; a scraper-plate in Witnesses:

said storage-chamber for preventing clogging; Gr. VALENTINE SAXBY, a coal-supporting plate in said storage-cham- A. R. MORGAN. 

